fix(base-assets): 资产详情还原 — 容器比例/提示词框固定/hover反白/缺三视图标签

- F1 缺三视图标签:橙底白字 r-sm → 白底琥珀描边胶囊(对齐设计稿)
- F3 立绘容器 3/4 → 9/16(资产详情左 + 库 adx-lead-img)
- F4 库三视图格 adx-tri-cell 3/4 → 16/9(流水线详情本就 16/9)
- F6 资产详情提示词栏 .ad-detail-prompt 固定高度 88px + resize:none
- F2 人物提示词框 .asset-prompt-edit 固定 74px(≈三行)+ resize:none,studio rows 4→3
- F7 三视图上方 icon 按钮 hover:橙底+白 icon(原仅字色变橙)
- F5 资产详情「重跑立绘/替换」按钮行右对齐
- F8(商品块 vs 人物块统一)结构性差异,待用户指认,本轮挂起

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

core/frontend/src/routes/pipeline.tsx

@@ -3617,7 +3617,7 @@ export function PipelinePage(props: {
                         <span className="ad-ratio-chip">立绘 {portraitVersions.length} 版</span>
                       </div>
                       <textarea className="ad-detail-prompt" placeholder={isPerson ? "描述这个角色的立绘…" : "描述这个场景…"} value={adPrompt} onChange={(e) => setAdPrompt(e.target.value)} />
-                      <div style={{ display: "flex", gap: 8, marginTop: 10 }}>
+                      <div style={{ display: "flex", gap: 8, marginTop: 10, justifyContent: "flex-end" }}>
                         <button className="btn btn-primary btn-sm" type="button" disabled={busyPortrait} onClick={() => void regenPortrait()}>
                           {busyPortrait ? <span className="asset-spinner sm" aria-hidden="true" style={{ marginRight: 4 }}></span> : <svg width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.6" strokeLinecap="round" strokeLinejoin="round" style={{ marginRight: 4 }}><path d="M4 12a8 8 0 0 1 14-5.5L21 9" /><path d="M21 4v5h-5" /><path d="M20 12a8 8 0 0 1-14 5.5L3 15" /><path d="M3 20v-5h5" /></svg>}
                           {busyPortrait ? "生成中…" : (isPerson ? "重跑立绘" : "重跑")}